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<div><a href="../../index.html">Home</a> &gt;  <a href="../index.html">matgraph</a> &gt; <a href="index.html">@graph</a> &gt; component.m</div>

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<h1>component
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="box"><strong>component(g,v) -- find vertices in v's component of g</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="box"><strong>function vtcs = component(g,v) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="fragment"><pre class="comment"> component(g,v) -- find vertices in v's component of g</pre></div>

<!-- crossreference -->
<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../../matlabicon.gif)">
<li><a href="matrix.html" class="code" title="function A = matrix(g)">matrix</a>	matrix(g) --- return (a copy of) the adjacency matrix of g</li><li><a href="nv.html" class="code" title="function n = nv(g)">nv</a>	nv(g) --- number of vertices in g</li></ul>
This function is called by:
<ul style="list-style-image:url(../../matlabicon.gif)">
<li><a href="components.html" class="code" title="function p = components(g)">components</a>	components(g) --- find the components of the graph g</li></ul>
<!-- crossreference -->


<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function vtcs = component(g,v)</a>
0002 <span class="comment">% component(g,v) -- find vertices in v's component of g</span>
0003 
0004 n = <a href="nv.html" class="code" title="function n = nv(g)">nv</a>(g);
0005 <span class="keyword">if</span> (v &lt; 1) || (v&gt;n)
0006     error(<span class="string">'Vertex out of range'</span>)
0007 <span class="keyword">end</span>
0008 
0009 vec = zeros(n,1);
0010 vec(v) = 1;
0011 A = <a href="matrix.html" class="code" title="function A = matrix(g)">matrix</a>(g);
0012 <span class="keyword">while</span>(true)
0013     w = double(A*vec +vec &gt; 0);
0014     <span class="keyword">if</span> nnz(w) == nnz(vec)
0015         <span class="keyword">break</span>
0016     <span class="keyword">end</span>
0017     vec = w;
0018 <span class="keyword">end</span>
0019 vtcs = find(vec);</pre></div>
<hr><address>Generated on Fri 30-Apr-2010 07:51:16 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/">m2html</a></strong> &copy; 2003</address>
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